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Journal of Wildlife Diseases, 43(4), 2007, pp. 789-793
© Wildlife Disease Association  2007
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SHORT COMMUNICATION

Influenza A Virus in Birds during Spring Migration in the Camargue, France

 Camille Lebarbenchon1,2,4, Chung-Ming Chang2,3, Sylvie van der Werf3, Jean-Thierry Aubin3, Yves Kayser1, Manuel Ballesteros1, François Renaud2, Frédéric Thomas2 and Michel Gauthier-Clerc1

1 Station Biologique de la Tour du Valat, Le Sambuc, 13200 Arles, France;
2 GEMI, UMR CNRS/IRD 2724, IRD, 911 Avenue, Agropolis BP 64501, 34394 Montpellier Cedex 5, France;
3 Unité de Génétique Moléculaire des Virus Respiratoires, URA1966 CNRS, EA302 Université Paris 7, Institut Pasteur, 25-28 Rue du Dr Roux, 75724 Paris Cedex 15, France
4 Corresponding author (email: lebarbenchon{at}tourduvalat.org)

ABSTRACT:   Wild aquatic birds are considered to be the natural reservoir for influenza A viruses, and previous studies have focused mainly on species in the orders Anseriformes and Charadriiformes. In this study, we surveyed a larger spectrum of potential hosts belonging to 10 avian orders. Cloacal swabs (n=1,044) from 72 free-living bird species, were analysed by reverse transcription-polymerase chain reaction for the presence of avian influenza virus. Only two Mediterranean Gulls (Larus melanocephalus) tested positive; one of these viruses was identified as an H9N2 subtype. The absence of infection among passerine birds supports the idea that the prevalence of avian influenza virus infection in terrestrial species is low.
  Key words:  Avian influenza, H9N2, Larus melanocephalus, Mediterranean Gulls, passerine birds.






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